Friction coupling



March 1, 1932. 'E Tn LORlG 1,847,882

FRICTIN coUPLING Filed Sept.l 30'l 1929 l il weyzto': l

Patented Mar. 1, 1932 UNITED STATES EDWIN fr. Lome, oFrGARY, INDIANA rnrc'rroN coUiLING Application led September 30, 192,9.y Serial-No. 396,377.

A further object is to provide a coupling composed of few parts which `will require no oiling, greasing or other maintenance and which will have long life due to the absence of moving parts. r

In the drawings Figure 1 is a side elevation of a coupling constructed in accordance with this inven.

tion.

Figure 2 is a sectional end elevation taken on the line II-II of Figure 1.

Figure 8 is a side elevation of the coupling of Figures 1 and 2. 1

Referring more particularly to the drawings, the numeral 2 designates a driv1ngshaft which may receive its power from a motor or any other prime mover (not shown) and the numeral 3 designates a driven shaft of any apparatus which it is desired to drive by coupling to the shaft 2.

The shaft 2 is provided with a drum 4 which is keyed thereto and rotates therewith, and the shaft 3 is provided with a drum 5 which is keyed thereto and adapted to rotate therewith.

The drums 4 and 5 are adapted to be brought into alinement and have their outer ends provided with flanges 4a and 5a, respectively.

A two-part coupling band is mounted around the drums 4 and 5 and is composed of an outer resilient and flexible body or shell 7 and an inner lining 8 of fabric pref- 45 erably, such as is usually applied to brake y bands of automotive vehicles and the like.` The band Vis divided along its longitudinal center line to form upper and lower parts A and B and each part has the longitudinal edgesV provided with outwardly extending kslightly tighten the bolts 10 to increase the fianges 9. The flanges 9 may be formed by attaching angle-shaped bars to the body or shell 7 or may be formed by turning the body, as desired.

The fianges 9 are apertured at spaced intervals to receive bolts 10 and springs 11 are mounted between the heads of the bolts 10 and the iiange on the upper part A of the coupling so as to provide adjustable tensioning means for forcing the band parts A and B toward each other and into frictional engagement with the drums 4 and 5.

It will be understood that, if desired, the springs 11 may be omitted and the bolts alone l be used for forcing or drawing the band parts 65 toward eachother and into frictional engagement with the drums. When the springs 11 are omitted it will be necessary to occasionally tighten kthe bolts 10 while when the A, springs 11 are used they will automatically take up wear on the band lining 8.

In operation the driving force from the driving drum 4 to the driven drum 5 will be transmitted entirely through the coupling band and since there are no moving parts or complicated mechanism there is no danger ofthe coupling failing. In case of slippage under normal loads it is only necessary to frictional engagement of the band on the drums.

While I have shown and described a certain specific embodiment of my invention it will be understood that I do not wish to be limited thereto since various modifications may be made without departing from the scope of my invention, as defined in the appended claim.

I claim:

A flexible friction drive-coupling comprisv. ing in combination a driving member, a driven member and a coupling band frictionally engaging said members and conveying the driving `force from onek member to the other, c. saidy bandV comprising an outer resilient and flexible metal shell and an inner friction lining, said band being divided along its longitudinal center line at diametrically opposite points to form two semi-circular parts, Y voutwardly extending rigid anges along each '10 longitudinal edge of said parts, said flanges being apertured to receive bolts for drawing the parts of said band toward each other and into frictional engagementwith said members, springs mounted between the heads of said bolts and the flanges on one of the parts of said coupling and forming adjustable tensioning means for forcing the band parts toward each other and into frictional engagement with the driving and driven members,

and a flexible friction fabricl lining the.

inner surface of each of said band arts.

In testimony whereof, I have heren-11450set* my hand.

EDWIN T; LORIG'.

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